Post-hole borer



(No Model.)

F. E. WREN.

POST HOLE BORER.

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FRANKLIN E. VREN, OF BLOOMFIELD, LOGAN COUNTY, OHIO.

POST-HOLE BORER.

SPECIFICATIONorming part of Letters Patent No. 341.982, datedlvlay 18,1886.

Application tiled October' 17, 1885.

To all whom it may concern:V

Be it known that l, FRANKLIN E. WREN, a citizen of the United States,and a resident of' Bloomfield township, in the count-y of Logan andState of Ohio, have invented a new and useful Post-Hole Borer, ot' whichthe following is a specification.

Figure l is a side View, part cut away, to show other parts. Fig. 2 is atop viewg'Fig. 3, a top View of horizont-al bevel-gear, auger, shaft,key, tre. Fig. 4L is a top view ot' my auger proper.

Myinvention is an improved post-holebon ing machine; and it consists ofan upright frame supported on a truck, the legs and wheels of the truckbeing adjustable vertically to suit the ground, the frame carrying anearthauger attached to the end of a vertical screw, which is operated bymeans of the miterwheels M N N and crank O in boring, and which israised out ofthe ground when desired by means of the pinions P P andcrank Q. The screw passes down through miterwheel M and is keyed to itby means of key R, attached to wheel M, so that it must turn when wheelM turns. Key R, however, plays loosely in a vcrticalslot in screw K, sothat it may slip endwise in wheel M withoutaffecting the wheel. It iskept from slipping endwise, however, by the two pinions, P P, the teethon which are made of shape to mesh with the threads of the screw.

The operation is as follows: The machine is wheeled into position andthe handles O turned, operating the miter-wheels N and through .them themiter-wheel M. As M revolves, thekey R, fitting in spline S, revolvesthe auger, the threads of which mesh with the teeth of pinions P P,which cause the screw to advance into the ground, the teeth formingbearings for the threads to work in. W'hen the hole has been bored theproper depth, the

the lowerends coming to a point,

Serial No. 180,178. (No model.)

crank Q is turned, revolving pinions P P and withdrawing the auger fromthe ground rapidly and without revolving it, and carrying the dirt upout of the hole. The auger has a free vertical movement through wheel M,the key R litting loosely in the slot S.

The auger consists of two separate wings crossing each others pathsomewhat like an X, reaching each two-thtds around the stein, and eachhaving a small blade, V, for cutting roots, extending vertically fromtheir faces. By this arrangement, in practice, stones tive inches indiameter can pass u p between the spiral blades of the auger.

The form of auger used can be varied to that shown in Fig. l, but Iprefer the one above described as the most effective, and the morereadily allowing stones to pass up in boring.

My frame is provided with two handles, C C, by means of which and thewheels I the machine is readily moved about.

l am aware that earth-angers have been con structed wherein the earth-auger' was advanced by means of miter-wheels, cranks, and screws, anddo not claim the same, broadly, but only my improvement therein, asfollows:

VVhatI claim isv 1. The combination of screw K, wings T, root-cutter V,the miter-wheels M N, cranks O,\vheels P, and handle Q. as and for thepurpose set forth.

2. The cornbinatiomwith the auger operated by means of screw K, wheels MN, cranks O, wheels P, and handles Q, of the handles O and wheels I, asand for the purpose set forth.

FRANK LIN E. VREN.

